Expand the Columns using a TB-2640B/2641B/2642B/2643B/2644B/2645B

The column expansion procedure is the same for all of the terminal block modules with two identical row connection headers. This includes the NI TB-2640B/2641B/2642B/2643B/2644B/2645B.

Note The NI TB-2645B requires two row ribbon cables for matrix expansion.
  1. Connect one end of the ribbon cable to either row connection header on one of the terminal blocks.
  2. Connect the other end of the ribbon cable to either row connection header on the other terminal block.

Use the appropriate row ribbon cable header as specified in the following table.

Terminal Block Module Row Connection Header 1 Row Connection Header 2
NI TB-2640 J2 J3
NI TB-2642B J8 J9
NI TB-2643B J4 J5
NI TB-2644B J4 J5
NI TB-2645B Cable 1 - J4 Cable 1 - J5
Cable 2 - J6 Cable 2 - J7
NI TB-2641B J4 J5
Note For the NI TB-2645B, do not connect a row ribbon cable from a Cable 1 header to a Cable 2 header.